【作者】 杜智涛； 魏洪峰； 姜明波； 李萍；

【Author】 DU Zhitao,WEI Hongfeng,JIANG Mingbo,LI Ping(Beijing Research Institute of Application Meteorology,Beijing 100029,China)

【机构】 北京应用气象研究所；

【摘要】 本文介绍了铂电阻测温仪的测温原理,分析提出了提高铂电阻测温仪测量准确度的硬件电路设计方法以及软件算法,其中硬件电路采用比例法,不仅对电源要求低,还不必考虑零点、温度漂移等问题,测量准确度只与铂电阻的准确度有关。同时,软件算法可采用牛顿迭代法或采用查表法与线性插值相结合的方法,能够较好对铂电阻进行非线性校正。更多还原

【Abstract】 The theory of temperature measurement with PRT is introduced in this paper.A method of improving the accuracy of temperature measurement based on the design of hardware circuit and software arithmetic has been suggested.The hardware circuit based on the scaling method,There is no need to adopt high precision power supply and none to consider the problems such as zero shifts,temperature shifts,etc.Also the software arithmetic adopt the Newton iteration method and combine with look up table method and linearity fitting method,the error caused by nonlinearity can be reduced effectively.更多还原